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18 Inch Car Subwoofer 3000 Watt AES 1.8+1.8 Ohm 4" Voice Coil Transducer | eBay
Eminence SIGMA PRO-18A: 18 inch Pro Woofer | Midwest Speaker Repair
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One unit (not pair) |18 Inch Woofer for Bass Compensation of Open Baffle or Cabinet | W-18 - Lii Song (Lii Audio), unique speaker, amplfier, quality and cost-saving parts for HiFi DIY
Blast King PROFILE18 18" 3000 Watts Peak Power Woofer, Part #PROFILE18 - Speaker Exchange
Amazon.com: DS18 PRO-BX18N.2D Car Subwoofer Audio Speaker - 18" in Neodymium Magnet, 6" Dual Voice Coil, 4 Ohm Impedance, 2500W Rms Power, 5000W Max Power - Reinforced Paper Cone for Outstanding Performance :